Do people here make their own tea blends? How does someone go about doing that? Try it & see I guess... I'm sure there's plenty of variation between brands & from one package to another, which might make blending them tricky.

I blend teas occasionally. I buy loose leaf teas from a number of places and from time to time I will put a teaspoon of this and a teaspoon of that in, but not very often. Most frequently I will add some peppermint to a tea to give it a little minty lift, but sometimes I will add other teas as well.